The four ghosts in the classic 80's video game Pac-Man are named Blinky (red), Pinky (pink), Inky (cyan), and Clyde (orange). Each ghost has its own unique behavior and movement pattern, which makes the game more challenging and interesting. Blinky is the most aggressive of the four ghosts and will try to chase down Pac-Man directly, while Pinky tends to ambush Pac-Man by cutting him off at corners. Inky's movements are influenced by both Blinky and Pac-Man's position, and Clyde moves randomly or tries to get as far away from Pac-Man as possible.